// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?m)\b(?=[A-Z]{3}\b)A?([B-Z])A?\1A?\b").unwrap();
let string = "BBA -> true
ABB -> true
BAB -> true
CCA -> true
AAA -> false (change \"[B-Z]\" to \"[A-Z]\" to match this)
CCB -> false
ABC -> false
BAC -> false
BBBA -> false (there have to be only two)
ABBB -> false (there have to be only two)
ABBA -> false (there has to be only one A)
BABA -> false (there has to be only one A)
BBAA -> false (there has to be only one A)";
// result will be an iterator over tuples containing the start and end indices for each match in the string
let result = regex.captures_iter(string);
for mat in result {
println!("{:?}", mat);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/